Tidewater & Chesapeake spans USDA hardiness zones 7b-9a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
The low, flat, tidal coastal plain around Chesapeake Bay — sandy soils, mild maritime winters, and a long season for vegetables and Southern staples. These conditions suit okra, tomato, sweet corn, and holly — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Tidewater & Chesapeake spans Delaware, Maryland, North Carolina, South Carolina and Virginia. Its footprint follows the EPA Level III ecoregion boundary; the counties linked below are representative of the region, not an exhaustive list.
Your yard isn't all of Tidewater & Chesapeake.
Tidewater & Chesapeake spans USDA zones 7b-9a, but your parcel sits in exactly one — and slope, tree cover, and low spots nudge it further. Enter your address and we'll score 1,086 plants against your land's actual soil, sun, and frost.
We read public map data around Tidewater & Chesapeake — soil, climate, flood, and parcel records. How we handle your address.
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Tidewater & Chesapeake — the short answer
Tidewater & Chesapeake: USDA zones 7b-9a, 232–303 frost-free days depending where in it you stand, across 5 states.
- USDA zones
- 7b-9a
- USDA PHZM 2023, aggregated over the footprint
- Shortest season here
- 232 days
- NOAA Regional Climate Centers ACIS, 1991-2020 — Wicomico County
- Counties
- 60
- US Census TIGER/Line 2025
- Region type
- EPA ecoregion
- Growable Ground growing-region registry
Region boundary: Growable Ground growing-region registry — curated county clusters, EPA Level III ecoregions, and town clusters drawn finer than any county. The season figure is this region's own record, measured across its 60 member counties, not a state or national average.
Hardiness Zone Range
Tidewater & Chesapeake is not one growing season
One answer for Tidewater & Chesapeake averages 60 counties whose growing seasons are 71 days apart — from 232 frost-free days in Wicomico County to 303 in Dare County. That is the same region, measured the same way, in the same years. Which end of it your land sits nearer decides what finishes before the first hard freeze.
The middle half of 60 counties runs 252–281 days, with a median of 267 days — a 71-day span end to end.
Measured across 60 member counties, each carrying its own 28°F normal. NOAA Regional Climate Centers ACIS, 1991-2020. A member with no own record is absent from the range rather than counted as zero — nothing here is interpolated to the region. Your own site sits somewhere inside this range; a parcel report resolves where.
Where the line runs inside Tidewater & Chesapeake
The middle half of Tidewater & Chesapeake runs 252–281 frost-free days, and 30 of its 60 counties sit outside that — 15 on the short side, 15 on the long. A regional planting date describes the middle well and the ends poorly, which is worth knowing before you follow one.
Under 252 frost-free days
15 counties
- Wicomico County · 232 days
- Caroline County · 233 days
- Gates County · 237 days
3 of 15 shown
The end of the region that sets the planting calendar — start seed indoors here and the season stretches to meet the crop.
252–281 frost-free days
30 counties
0 of 30 shown
The middle half of the region, and the part a single regional season describes well.
Over 281 frost-free days
15 counties
- Dare County · 303 days
- Jasper County · 302 days
- Hyde County · 293 days
3 of 15 shown
Long enough for a second succession of a quick crop after the first comes out.
Each county is placed by its OWN 28°F frost-free normal (NOAA Regional Climate Centers ACIS, 1991-2020), the same figure its own guide page publishes. Elevation, slope and cold-air drainage move a site within its county as well — which is the part only your address resolves.
What Grows in Tidewater & Chesapeake
All 4 of the plants below that publish a season requirement clear even Wicomico County’s 232 frost-free days — so on season alone, this grid works at both ends of the region. The 71-day spread still decides how far past this list you can push, and how early you can start.
Plants matched to Tidewater & Chesapeake's USDA zones 7b-9a, ordered by how much hardiness margin each has across the region — the ones with room to spare at both ends of this band lead. Each links to its full growing profile.
Native Plants of Tidewater & Chesapeake
Plants the USDA PLANTS Database documents as native and present in all 5 states this region crosses, kept only where the published hardiness range meets Tidewater & Chesapeake’s USDA zones 7b-9a — closest range match first. Presence is recorded by state, so a plant can be documented across the state and still be scarce in your corner of the region.
The ground across Tidewater & Chesapeake
The USDA soil survey maps this ground county by county. These are those records weighted by land area across 60 member counties — this region’s own profile, not a state figure.
The ground is predominantly Ultisols, at 67% of mapped acres, followed by Entisols (10%), Histosols (9%) and Inceptisols (7%). Seven soil orders appear somewhere inside the footprint, which is the honest reason a regional soil answer only goes so far. The most extensive named soils are Rains, Goldsboro, and Lynchburg.
26% of those acres are poorly drained, and another 19% very poorly drained, 16% moderately well drained. Topsoil pH runs 4.0–6.8 between the lowest and the highest county on record. 20% of the footprint is classed prime farmland.
Soil order
Ultisols
Drainage
Poorly drained
Topsoil pH
4.0–6.8
Hydric soils
54%
Soil changes across a driveway, so which of these your own ground sits on is a parcel question rather than a regional one. Hyde County holds the most wetland ground here, at 98% — soil types explained.
USDA NRCS SSURGO via Soil Data Access
What this means for growing in Tidewater & Chesapeake
The soil survey reads this ground county by county, and the readings above are those records summed across Tidewater & Chesapeake. Here is what they mean for a garden here — and the move an experienced grower makes about each one.
Drainage
From county records26% of the mapped acres across Tidewater & Chesapeake are poorly drained — ground that sheds water slowly. That is area-weighted across all 60 of its mapped counties.
Beds can stay saturated for days after heavy rain, and the roots of most vegetables, berries, and fruit trees suffocate or rot in soil that never drains.
Raised beds or mounded rows lift roots above the wet zone; choose water-tolerant crops for the lowest spots.
USDA NRCS SSURGO
Surface pH
From county recordsTopsoil across Tidewater & Chesapeake runs pH 4.0–6.8 — acidic in 59 of its 60 counties.
Blueberries, potatoes, and rhododendrons thrive in it, but most vegetables start locking out nutrients below about pH 6.0 and grow pale and stunted no matter how much you feed them.
A measured lime application raises pH for the crops that need it — but test first, because the right rate depends on your own soil, not the county average.
USDA NRCS SSURGO
Safe to Grow Here?
What the federal record shows across Tidewater & Chesapeake — and how to grow with it.
Across Tidewater & Chesapeake's 60 counties the federal record holds 29,898 documented sites, mostly Underground Storage Tanks (16,249), Nitrate (5,985) and Brownfields (5,694). The heaviest single county is New Castle County, with 3,080.
That is a regional count, not a reading of any one lot — proximity to a documented site is information, not a diagnosis. Open the map outlined to Tidewater & Chesapeake to see which records sit where you actually grow.
Sources Checked
Summed across the 60 counties in Tidewater & Chesapeake
A note from Gnorman
What an experienced grower watches for around here
In and around Tidewater & Chesapeake, CAFO runs higher than the national average — 651 sites across the 60 counties in Tidewater & Chesapeake. That's not a problem with your land — it's information about it.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Your land is one point inside Tidewater & Chesapeake
Everything above resolves to Tidewater & Chesapeake as a whole — a footprint whose own counties record seasons 71 days apart, and hardiness across zones 7b-9a. Your parcel sits at one point in that range, not in the middle of it. Slope, tree cover, a low spot that pools cold air, and what is in the soil are all resolved at the address, and none of them are visible at region scale. That is the honest boundary of this page, and the reason the next step is a reading of your own ground rather than a better regional average.
Your Lot vs Tidewater & Chesapeake Average
Tidewater & Chesapeake Average
- ●USDA Zones 7b-9a, averaged across Tidewater & Chesapeake
- ●One soil character for all of Tidewater & Chesapeake
- ●State-average frost dates
YOUR Parcel
- ✓Your exact zone, not Tidewater & Chesapeake's 7b-9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Tidewater & Chesapeake
Pull a site-specific report for your exact address in Tidewater & Chesapeake — soil, sun, drainage, frost risk, contamination, and scored plant recommendations.
Three things about your lot that Tidewater & Chesapeake averages can't show:
We read public map data around Tidewater & Chesapeake — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not Tidewater & Chesapeake average
How we know this about Tidewater & Chesapeake
The boundary: an EPA Level III ecoregion (an area sharing climate, soils, and vegetation). Growing regions have no official boundary, so this footprint is our published one, and every figure on this page was measured over the counties inside it rather than borrowed from the state around it.
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, aggregated across the footprint; the growing season from NOAA Regional Climate Centers ACIS 1991–2020 28°F normals, read at each member’s own record; boundaries from US Census TIGER/Line 2025; the contamination record from the federal sources named in that beat above; the soil from the USDA NRCS SSURGO survey, read at each member county’s own record and weighted to this footprint by land area. Where a member carries no record of its own, it is absent from the figure rather than filled in.
Common questions about Tidewater & Chesapeake
What hardiness zone is Tidewater & Chesapeake?
Tidewater & Chesapeake spans USDA hardiness zones 7b-9a, aggregated from the USDA Agricultural Research Service Plant Hardiness Zone Map 2023 across the region's counties. Zones reflect average annual extreme minimum temperatures from 1991–2020 data.
How long is the growing season in Tidewater & Chesapeake?
Measured between 28°F hard freezes, Tidewater & Chesapeake's counties mostly run 252 to 281 frost-free days, median 267 (NOAA Regional Climate Centers ACIS, 1991–2020, over 60 member counties). That 29-day spread is the honest read — no single season describes 60 counties, and each county guide below carries its own.
When does frost risk end in Tidewater & Chesapeake?
Across Tidewater & Chesapeake, the middle half of member counties see their last 28°F hard freeze between Feb 28 and Mar 17 (median Mar 9), and their first fall freeze between Nov 25 and Dec 5. Those are hard freezes, not the last light frost: tender transplants wait for about Mar 30, and elevation decides which end of a 17-day spread you garden in.
What grows well in Tidewater & Chesapeake?
Tidewater & Chesapeake's conditions suit plants such as Okra, Tomato, Sweet Corn, Holly, Sweet Potato, Fig. What actually thrives on any one site still turns on its specific soil, sun, and drainage — we score each plant against the real conditions at your address.
How is Tidewater & Chesapeake defined?
Tidewater & Chesapeake's footprint follows an EPA Level III ecoregion — a boundary drawn where climate, soils, and vegetation actually change rather than where a state line falls. It covers 60 counties, and the counties linked on this page are representative of the region, not an exhaustive list.
Which states does Tidewater & Chesapeake cover?
Tidewater & Chesapeake spans Delaware, Maryland, North Carolina, South Carolina, and Virginia. Each state's full growing guide is linked on this page.
What other growing regions cover the same states?
Appalachia, Piedmont, Blue Ridge, Delmarva Peninsula, North Carolina Inner Coastal Plain (Eastern NC row-crop belt), and Carolina Sandhills share at least one state with Tidewater & Chesapeake. Growing regions overlap and interlock — a single address can sit inside more than one, which is why the precise read is always the parcel, not the region.
What this page reads at Tidewater & Chesapeake’s own scale
6 of the readings below were taken at Tidewater & Chesapeake's own scale — the zone 7b-9a band across its footprint, a median 267-day season across its 60 counties and 29,898 documented federal contamination records across its 60 counties, 3,080 of them in New Castle County alone; one is borrowed from a wider read, named and linked below.
Measured here
- The USDA hardiness band 7b-9a aggregated across all 60 counties in the footprintUSDA PHZM 2023
- The boundary itself — the EPA Level III ecoregion its 60 counties sit inside, drawn where climate and soils changeEPA Level III Ecoregions
- The growing character that makes this region distinct from the states it crossesGrowable Ground subregion registry
- The 28°F season across the footprint — the middle half of its 60 counties run 252 to 281 frost-free days, median 267NOAA Regional Climate Centers ACIS, 1991-2020
- The federal contamination record over the whole footprint — 29,898 documented federal contamination records across its 60 counties, 3,080 of them in New Castle County aloneEPA, USGS and USDA federal site records
- The soil order mix across the footprint — 67% Ultisols, topsoil pH 4.0–6.8, area-weighted across its 60 mapped countiesUSDA NRCS SSURGO
Inherited from a wider read
- The candidate plant list — all 5 member states' curated sets, merged and filtered to zones 7b-9afrom Delaware, Maryland, North Carolina, South Carolina and Virginia
What this page can’t tell you
- Which end of the 29-day range your ground sits at — 252 days at one extreme, 281 at the other, decided mostly by elevationfrost dates explained →
- Which of those soils your own ground sits on — the survey maps them county-wide, and they change across a drivewaysoil types explained →
- The soil pH, drainage, sun hours, and frost pockets on one specific lotwhy one lot differs from the next →
Explore Tidewater & Chesapeake
State growing guides
Representative counties
Other growing regions across Delaware, Maryland, North Carolina, South Carolina, and Virginia
The vast eastern mountain region of steep hollows, thin acidic soils, and short upland seasons — apples, brambles, ramps, and forest crops on hard-won ground. (Union of the core Appalachian ecoregions.)
The rolling foothill belt between the Appalachians and the coastal plain, defined by heavy red clay soils that reward amendment and drainage. (Southern Piedmont; the Northern Piedmont is a separate ecoregion.)
The high, cool, forested spine of the southern Appalachians — layered ridges, acidic mountain loams, and a short upland season suited to apples and cold-hardy crops.
A flat coastal-plain peninsula of sandy, well-drained soils between the Chesapeake and the Atlantic — a major sweet-corn, soybean, and produce region.
Eastern North Carolina's flat farm belt trades the Piedmont's red clay for free-draining sandy loam and a long 238–263-day frost-free season in Zone 8a–8b — the combination that makes these counties the state's tobacco, cotton, and sweet-potato heartland (North Carolina leads every state in sweet-potato production, centered here). It grows materially differently from the cooler, drainage-fighting red-clay Piedmont just upslope of the fall line, and from the poorly-drained, non-tidal loams here versus the maritime, tidal soils of the Tidewater downslope.
The fall-line band of deep, droughty sand ridges between the Carolinas' Piedmont and Coastal Plain — longleaf-pine and wiregrass country from Chesterfield up through Moore County, with warm zone-8a winters and a roughly 250-day frost-free season.